Going with Doom in all categories, and that’s not a knock on Magneto.
There’s something just really fun seeing Doom at his best/highest highs and it’s similar to Batman at his where he does something and you’re just like “holy shit that’s freaking cool”. I also just love a good egomaniac villain and Doom is the pinnacle of that.
Magneto is also amazing, and I think my favorite versions of Magneto are when he’s straddling the line between villain and anti hero. X Men may be my favorite comics so Magneto has a special place in my heart.
Magneto, Doom, and Joker are all in a way the zenith of their respective archetypes in the world or comics. (Lex & Doom fit the same one but I’m going Doom every time there and it’s not even close).
Who someone picks (assuming they’re familiar with more than just movie adaptation versions) is probably going to come down to which archetype they prefer in a villain more often than not. Someone who prefers the thematically deep/sympathetic villain is probably going to pick Magneto. And I can’t knock that because I definitely see the appeal and I enjoy/love those types too.
But I think I like the classic villain more when it’s done well bc there’s just something special about those to me when a writer manages to pull one off and make them truly iconic.
PS: Magneto sweeps in all when you do movie versions since we’ve never got a proper live action Doom.